"There's a huge difference in how Windows has changed over the years from Windows 95 through to 10 – Unix doesn't change that much,"
I'd say that Unix has probably changed just as much as Windows, the difference is that unlike Windows, and Linux, the people working on Unix understand the concept of backwards compatibility. I had programs compiled on Solaris in 1992 that still ran on Solaris in 2020, even though Solaris had changed hugely.